I download emacs with 'sudo apt-get install emacs'. When I run emacs, I see emacs with too big fonts. I don't know why the default setup to have normal font size in emacs. How can I do that?
The temporary solution
You can press C-x C-+ and C-x C-- to increase or decrease the buffer text size.
The permanent solution
Put the following in your
(set-face-attribute 'default nil :height 100)
The value is in 1/10pt, so 100 will give you 10pt, etc.
A slightly different way to do the same thing, by setting botht the font and size in one go, again in the .emacs file. If you want to use a differing font check it exists first or you will get an error message.